package com.ilancuo.thinkinjava.chapter_18;

import java.io.*;

public class Blip3 implements Externalizable {
    private int i;
    private String s;

    public Blip3() {
        System.out.println("Blip3 constructor");
    }

    public Blip3(String x, int a) {
        System.out.println("Blip3(String x, int a)");
        s = x;
        i = a;
    }

    @Override
    public String toString() {
        return s + i;
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        System.out.println("Blip3.writeExternal");
        out.writeObject(s);
        out.writeInt(i);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        System.out.println("Blip3.readExternal");
        s = (String) in.readObject();
        i = in.readInt();
    }

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        System.out.println("Constructing objects:");
//        Blip3 b3 = new Blip3("A String ", 47);
        Blip3 b3 = new Blip3();
        System.out.println(b3);
        ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("Blip3.out"));
        System.out.println("Saving object:");
        o.writeObject(b3);
        o.close();
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("Blip3.out"));
        System.out.println("Recovering object:");
        b3 = (Blip3) in.readObject();
        System.out.println(b3);
    }
}
